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' l J Pe t r-9* 1 Iiinxronsronn ronnon,innorauio."ff

' To. all "whom zt-may i concern."

[in refri Be it known that )I, av

citizen of the UnitedzlKgingdomjof. Great Britain and Ireland,- andresident of 120" Harrow road, Leytonsto'ne,London; E. 11,

En -land, haye invented certain new and use ul Improvements RelatingtoAgents for Refrigeration Plants, of which. the following isaspecificatiomsuchas will enable --othersskilld in the art-to which it.ap-

pertainsto make and use thesame.

The lnventlon relates to agents. for use gerating apparatus andtoprocesses of manufacturing same.

chlorid have, been used separately in such machines 'for refrigeration,but I have methyl and ethyl chlorid for reasons set out hereinafter, andalsoybec'a use'by means of' the processes hereinafter. described,.I canr the original product.

unsuitable for certain purposes, for example in small plats whereskilledat'tention isnot available. Inthe casesof machines using pureethyl chlorid owing to the necessity of using vacuum there is a tendencyfor air 7 to leak into the system from the atmosphere,

which hinders the ellioientoperation of the machine. I

By the use of a mixture of methyl chlorid and ethyl ;ch'loridwaccordingto" this inven Y ition, these defects can be largely overcome,

The-main advantage resulting from my. invention relates however to theeconomy'obtained in the production of the refrigerating agent. 7

According tothis invention, the mixture of methyl and "ethyl chlorid foruse in refrigerating machines is obtained from a mixture of methyl andethyl alcohol sfby the action of hydrochloric acid or some mixture ofsubstances capableof generating this compound, for examplesodium chloridand sulfuric acid. .The alcohols may be comparatively impure andother'substances, for example, water, hydrocarbons, or catalysts such as zincchlorid, sodium sulfate, or other known catalysts and the like maybe 7present.-

invention is particularly applicable to refrigerating machineryin whichreadily condensablevaporsor fluids are used.

In the past-"ethyl chlorid and methyl mately 96% ethyl chloridfand 4%chlorid, I proceed as follows I take 100 parts by weight of a m xture,of ethyl alcohol andm'ethylk alcohol conteame wa -e.i rear-ea salsa).

Application fi'ldOctdber 31,4919 Serial "mass i390.

necessity to use purealcohols in the manu.-' facture according tofthisinvention;

' thedifi'ei'encein boiling i Then I desire'to prepare a mixture of a' Iby the direct-transformation of thealcoholio mixture, I may, accordingto my in vention, by redistillation or fractionalcondensation obtainamixture of difierent compos1t10n. Thus forfexamplaif I had prepared froma mixture of methyl and ethyl alcohols in any proportion a mixturecondi-iferent composition from that obtained" '65 taining ethyl chloridand methyl. chlorid, i

I eouldapply this mixture directly in r efr1gerat1ng machinery or if Idesired a mix} *ture of different-composition I 'redistil this.

product andso obtain other-mixturesihaving. different proportions ofethyl chlorid and ofmethylchlorid, or I may separate aipure ethylchlorid and a mixture containing a larger proportion of'methyl chloridthan By the hereinbefore mentioned processes, I can produce mixtures ofmethyl and ethyl chlorids' of any desired composition for applicationinrefrigerating machinery.

The following example givesa method of producing the mixture accordingto the in-- To produce a mixture of ethyl chlorid and methyl chloridcontaining approximethyl taining approximately 95% ethyl alcohol and 5%methyl alcohol, ora quantity of a mixture of these within dilferentsubstances" substantially as described in the'specification containingthe same quantities and proportions of these alcohols, and mix therewith5' parts of zinc chlorid dissolved in the smallest proportion of water.The mixture "I then saturate with hydrochloric acid gas by bubbling thisgas through until no further absorption takes placethe mixture soobtained is distilled. If the operation is properly conducted at least100 parts of at E wample 2.

In order to obtain a mixture containing a larger proportion of methylchlorid I may take the roduct prepared as above and redistil. he vaporsfirst passing over contain a greater proportion of methyl chlorid, andby stopping at a certain stage easily ascertained by simple known tests,I can obtain a quantity of a mixture of any desired composition.

What I claim and desire to secure by Letters Patent is An improved agentfor use in refrigerating machines consisting of a mixture of methylchlorid and ethyl chlorid.

In WIlSIlGSS' whereof I have hereunto set my hand in presence of twoWitnesses.

ALBERT HENNING. Witnesses:

HENRY FAIRBROTHER, ELIZABETH PARRY.

